US5920550A - System, method, and apparatus for soft handoff - Google Patents
System, method, and apparatus for soft handoff Download PDFInfo
- Publication number
- US5920550A US5920550A US08/728,727 US72872796A US5920550A US 5920550 A US5920550 A US 5920550A US 72872796 A US72872796 A US 72872796A US 5920550 A US5920550 A US 5920550A
- Authority
- US
- United States
- Prior art keywords
- access channel
- channel message
- active set
- measured pilot
- access
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 22
- 239000000523 sample Substances 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000001413 cellular effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
- H04W36/00692—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink using simultaneous multiple data streams, e.g. cooperative multipoint [CoMP], carrier aggregation [CA] or multiple input multiple output [MIMO]
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims (7)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/728,727 US5920550A (en) | 1996-10-11 | 1996-10-11 | System, method, and apparatus for soft handoff |
ARP970104345A AR008480A1 (en) | 1996-10-11 | 1997-09-22 | TRANSFER METHOD IN A WIRELESS COMMUNICATION ARRANGEMENT AND COMMUNICATION DEVICE WHERE IT IS USED. |
GB0102512A GB2356781B (en) | 1996-10-11 | 1997-09-22 | System method and apparatus for soft handoff |
GB9720005A GB2318256B (en) | 1996-10-11 | 1997-09-22 | System,method and apparatus for soft handoff |
CA002216225A CA2216225C (en) | 1996-10-11 | 1997-09-23 | System, method and apparatus for soft handoff |
DE19744177A DE19744177B4 (en) | 1996-10-11 | 1997-10-07 | Moving station and base station for soft forwarding |
JP29355197A JP3762069B2 (en) | 1996-10-11 | 1997-10-08 | System, method and apparatus for soft handoff |
CN97120416A CN1114325C (en) | 1996-10-11 | 1997-10-09 | System method and apparatus for soft handoff |
BR9706522-6A BR9706522A (en) | 1996-10-11 | 1997-10-09 | System, method and apparatus for smooth non-interference |
KR1019970051980A KR100262923B1 (en) | 1996-10-11 | 1997-10-10 | Soft handoff in a cdma communication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/728,727 US5920550A (en) | 1996-10-11 | 1996-10-11 | System, method, and apparatus for soft handoff |
Publications (1)
Publication Number | Publication Date |
---|---|
US5920550A true US5920550A (en) | 1999-07-06 |
Family
ID=24928056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/728,727 Expired - Lifetime US5920550A (en) | 1996-10-11 | 1996-10-11 | System, method, and apparatus for soft handoff |
Country Status (9)
Country | Link |
---|---|
US (1) | US5920550A (en) |
JP (1) | JP3762069B2 (en) |
KR (1) | KR100262923B1 (en) |
CN (1) | CN1114325C (en) |
AR (1) | AR008480A1 (en) |
BR (1) | BR9706522A (en) |
CA (1) | CA2216225C (en) |
DE (1) | DE19744177B4 (en) |
GB (1) | GB2318256B (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000014983A1 (en) * | 1998-09-02 | 2000-03-16 | Motorola Inc. | Communication device and method for determining the signal quality of communication resources in a communication system |
US6049716A (en) * | 1997-05-29 | 2000-04-11 | Samsung Electronics Co., Ltd. | Soft swap handoff method in CDMA cellular system |
US6195551B1 (en) * | 1997-07-22 | 2001-02-27 | Shinsegi Telecomm, Inc. | Idle handoff controlling method in cellular communication system |
US6208858B1 (en) * | 1998-07-21 | 2001-03-27 | Qualcomm Incorporated | System and method for reducing call dropping rates in a multi-beam communication system |
US6320855B1 (en) * | 1999-09-09 | 2001-11-20 | Qualcom Incorporated | Method and system for initiating idle handoff in a wireless communications system |
WO2001093454A2 (en) | 2000-05-27 | 2001-12-06 | Motorola Inc | Communications system and method of administering connections therein |
WO2001099311A1 (en) * | 2000-06-21 | 2001-12-27 | Samsung Electronics Co., Ltd. | Apparatus and method for reporting service load to mobile station in mobile telecommunication system |
US6345185B1 (en) * | 1998-08-14 | 2002-02-05 | Lg Information And Communications, Ltd. | Method for transmitting a PSMM in a communication system |
US20020068566A1 (en) * | 2000-12-04 | 2002-06-06 | Jonas Ohlsson | Preliminary performance of handover function in telecommunications system |
US6549787B1 (en) * | 1999-04-26 | 2003-04-15 | Samsung Electronics Co., Ltd. | System and method for use in an MSC-BS interface for supporting an access state handoff |
KR100392111B1 (en) * | 2000-03-29 | 2003-07-22 | 산요 덴키 가부시키가이샤 | Mobile station of the cdma communication system and communication method of the same |
US6633554B1 (en) * | 1998-09-01 | 2003-10-14 | Samsung Electronics Co., Ltd. | System and method for soft handoff setup during system access idle handoff in a wireless network |
US20040052230A1 (en) * | 1998-10-05 | 2004-03-18 | Soliman Samir S. | Method and apparatus for detecting forward and reverse link imbalance in digital cellular communication systems |
US6721564B1 (en) | 1999-04-07 | 2004-04-13 | Kabushiki Kaisha Toshiba | Mobile communication terminal apparatus having hand-over requesting function, hand-over control device, hand-over controlling method and storage medium storing the hand-over controlling method |
FR2846183A1 (en) * | 2002-10-21 | 2004-04-23 | Evolium Sas | Network controller and equipment port change managing method, involves ordering message to continue connection on port while maintaining another port till it receives data from latter port and/or acknowledgment from equipment |
US20040082320A1 (en) * | 1994-04-28 | 2004-04-29 | Metro One Telecommunications, Inc. | Directory assistance method and apparatus |
US20050085230A1 (en) * | 2003-10-16 | 2005-04-21 | Motorola, Inc. | Circuit and method for producing a pilot strength measurement message |
US20070086391A1 (en) * | 2001-08-17 | 2007-04-19 | Qualcomm, Inc. | Method and apparatus for call setup latency reduction |
US7397777B1 (en) | 1999-11-01 | 2008-07-08 | Hitachi, Ltd. | Handoff control method and a mobile station employing the same |
US7957705B1 (en) | 2008-03-18 | 2011-06-07 | Sprint Spectrum L.P. | System and method for reducing radio frequency interference caused by a carrier |
US10581709B2 (en) * | 2015-10-29 | 2020-03-03 | Verint Systems Ltd. | System and method for soft failovers for proxy servers |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5854785A (en) * | 1996-12-19 | 1998-12-29 | Motorola, Inc. | System method and wireless communication device for soft handoff |
US6104927A (en) * | 1998-05-28 | 2000-08-15 | Motorola, Inc. | Communication system, mobile station, and method for mobile station registration |
JP2000151504A (en) * | 1998-11-18 | 2000-05-30 | Nec Saitama Ltd | Base station radio terminal and its control method |
JP3750390B2 (en) * | 1999-01-08 | 2006-03-01 | 日本電気株式会社 | Call control method and system in mobile communication |
MY128734A (en) * | 1999-03-22 | 2007-02-28 | Golden Bridge Tech Inc | Common packet channel |
US6606341B1 (en) | 1999-03-22 | 2003-08-12 | Golden Bridge Technology, Inc. | Common packet channel with firm handoff |
US6574267B1 (en) | 1999-03-22 | 2003-06-03 | Golden Bridge Technology, Inc. | Rach ramp-up acknowledgement |
US6253083B1 (en) * | 1999-07-21 | 2001-06-26 | Lucent Technologies Inc. | Mobile switching center for providing wireless access Ho |
US6675015B1 (en) * | 1999-09-15 | 2004-01-06 | Nokia Corporation | Apparatus, and associated method, for facilitating communication handovers in a bluetooth-public-access radio communication system |
DE10031065B4 (en) * | 2000-06-26 | 2005-07-07 | Siemens Ag | Method and radio station for signaling information in a radio communication system |
US6717924B2 (en) * | 2002-01-08 | 2004-04-06 | Qualcomm Incorporated | Control-hold mode |
KR100451192B1 (en) * | 2002-05-30 | 2004-10-02 | 엘지전자 주식회사 | Cell reselection method for radio communication network |
JP4525207B2 (en) * | 2004-06-25 | 2010-08-18 | 株式会社日立製作所 | Wireless communication system |
US8000302B2 (en) | 2005-06-23 | 2011-08-16 | Qualcomm Incorporated | Adaptive multi-channel modem |
KR100706519B1 (en) * | 2005-12-07 | 2007-04-12 | 엘지전자 주식회사 | Method for maintaining call connection of mobile communication terminal and the mobile communication terminal therefor |
US8290524B2 (en) * | 2007-01-17 | 2012-10-16 | Qualcomm Incorporated | Systems and methods for maintaining a transmission during a channel fade |
US8194617B2 (en) | 2007-10-05 | 2012-06-05 | Qualcomm Incorporated | Method and apparatus for increasing efficiency of data packet transmission |
CN101686557B (en) | 2008-09-22 | 2014-04-02 | 华为技术有限公司 | Method and device for sending multi-cell scheduling information and user equipment |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4479215A (en) * | 1982-09-24 | 1984-10-23 | General Electric Company | Power-line carrier communications system with interference avoidance capability |
US5610595A (en) * | 1991-12-09 | 1997-03-11 | Intermec Corporation | Packet radio communication system protocol |
US5640414A (en) * | 1992-03-05 | 1997-06-17 | Qualcomm Incorporated | Mobile station assisted soft handoff in a CDMA cellular communications system |
US5699367A (en) * | 1995-12-29 | 1997-12-16 | Telefonaktiebolaget Lm Ericsson | Concatenated error detection coding and packet numbering for hierarchical ARQ schemes |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5101501A (en) * | 1989-11-07 | 1992-03-31 | Qualcomm Incorporated | Method and system for providing a soft handoff in communications in a cdma cellular telephone system |
US5109390A (en) * | 1989-11-07 | 1992-04-28 | Qualcomm Incorporated | Diversity receiver in a cdma cellular telephone system |
DE69325844T2 (en) * | 1992-04-17 | 2000-08-31 | Ericsson Telefon Ab L M | Mobile-assisted handoff with code division multiple access |
-
1996
- 1996-10-11 US US08/728,727 patent/US5920550A/en not_active Expired - Lifetime
-
1997
- 1997-09-22 AR ARP970104345A patent/AR008480A1/en unknown
- 1997-09-22 GB GB9720005A patent/GB2318256B/en not_active Expired - Lifetime
- 1997-09-23 CA CA002216225A patent/CA2216225C/en not_active Expired - Lifetime
- 1997-10-07 DE DE19744177A patent/DE19744177B4/en not_active Expired - Lifetime
- 1997-10-08 JP JP29355197A patent/JP3762069B2/en not_active Expired - Fee Related
- 1997-10-09 BR BR9706522-6A patent/BR9706522A/en not_active Application Discontinuation
- 1997-10-09 CN CN97120416A patent/CN1114325C/en not_active Expired - Lifetime
- 1997-10-10 KR KR1019970051980A patent/KR100262923B1/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4479215A (en) * | 1982-09-24 | 1984-10-23 | General Electric Company | Power-line carrier communications system with interference avoidance capability |
US5610595A (en) * | 1991-12-09 | 1997-03-11 | Intermec Corporation | Packet radio communication system protocol |
US5640414A (en) * | 1992-03-05 | 1997-06-17 | Qualcomm Incorporated | Mobile station assisted soft handoff in a CDMA cellular communications system |
US5699367A (en) * | 1995-12-29 | 1997-12-16 | Telefonaktiebolaget Lm Ericsson | Concatenated error detection coding and packet numbering for hierarchical ARQ schemes |
Non-Patent Citations (2)
Title |
---|
TIA/EIA Interim Standard, Mobile Station Based Station Compatibility Standard for Dual Mode Wideband Spread Spectrum Cellular System, TIA/EIA/IS 95 A, May 1995, pp. 6 105 to 6 114. * |
TIA/EIA Interim Standard, Mobile Station-Based Station Compatibility Standard for Dual-Mode Wideband Spread Spectrum Cellular System, TIA/EIA/IS-95-A, May 1995, pp. 6-105 to 6-114. |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040082320A1 (en) * | 1994-04-28 | 2004-04-29 | Metro One Telecommunications, Inc. | Directory assistance method and apparatus |
US6049716A (en) * | 1997-05-29 | 2000-04-11 | Samsung Electronics Co., Ltd. | Soft swap handoff method in CDMA cellular system |
US6195551B1 (en) * | 1997-07-22 | 2001-02-27 | Shinsegi Telecomm, Inc. | Idle handoff controlling method in cellular communication system |
US6714780B1 (en) * | 1998-07-21 | 2004-03-30 | Qualcomm Incorporated | System and method for reducing call dropping rates in a multi-beam communication system |
US6208858B1 (en) * | 1998-07-21 | 2001-03-27 | Qualcomm Incorporated | System and method for reducing call dropping rates in a multi-beam communication system |
US6345185B1 (en) * | 1998-08-14 | 2002-02-05 | Lg Information And Communications, Ltd. | Method for transmitting a PSMM in a communication system |
US6633554B1 (en) * | 1998-09-01 | 2003-10-14 | Samsung Electronics Co., Ltd. | System and method for soft handoff setup during system access idle handoff in a wireless network |
WO2000014983A1 (en) * | 1998-09-02 | 2000-03-16 | Motorola Inc. | Communication device and method for determining the signal quality of communication resources in a communication system |
US6950417B2 (en) | 1998-10-05 | 2005-09-27 | Qualcom, Incorporated | Method and apparatus for detecting forward and reverse link imbalance in digital cellular communication systems |
US20040052230A1 (en) * | 1998-10-05 | 2004-03-18 | Soliman Samir S. | Method and apparatus for detecting forward and reverse link imbalance in digital cellular communication systems |
US6785249B2 (en) * | 1998-10-05 | 2004-08-31 | Qualcomm, Incorporated | Method and apparatus for detecting forward and reverse link imbalance in digital cellular communication systems |
US6721564B1 (en) | 1999-04-07 | 2004-04-13 | Kabushiki Kaisha Toshiba | Mobile communication terminal apparatus having hand-over requesting function, hand-over control device, hand-over controlling method and storage medium storing the hand-over controlling method |
US6549787B1 (en) * | 1999-04-26 | 2003-04-15 | Samsung Electronics Co., Ltd. | System and method for use in an MSC-BS interface for supporting an access state handoff |
US6320855B1 (en) * | 1999-09-09 | 2001-11-20 | Qualcom Incorporated | Method and system for initiating idle handoff in a wireless communications system |
US7397777B1 (en) | 1999-11-01 | 2008-07-08 | Hitachi, Ltd. | Handoff control method and a mobile station employing the same |
KR100392111B1 (en) * | 2000-03-29 | 2003-07-22 | 산요 덴키 가부시키가이샤 | Mobile station of the cdma communication system and communication method of the same |
WO2001093454A2 (en) | 2000-05-27 | 2001-12-06 | Motorola Inc | Communications system and method of administering connections therein |
WO2001099311A1 (en) * | 2000-06-21 | 2001-12-27 | Samsung Electronics Co., Ltd. | Apparatus and method for reporting service load to mobile station in mobile telecommunication system |
AU766796B2 (en) * | 2000-06-21 | 2003-10-23 | Samsung Electronics Co., Ltd. | Apparatus and method for reporting service load to mobile station in mobile telecommunication system |
US20020068566A1 (en) * | 2000-12-04 | 2002-06-06 | Jonas Ohlsson | Preliminary performance of handover function in telecommunications system |
US20070086391A1 (en) * | 2001-08-17 | 2007-04-19 | Qualcomm, Inc. | Method and apparatus for call setup latency reduction |
US8126469B2 (en) | 2001-08-17 | 2012-02-28 | Qualcomm Incorporated | Method and apparatus for call setup latency reduction |
EP1414263A1 (en) * | 2002-10-21 | 2004-04-28 | Evolium S.A.S. | Method and device for managing resources in a communications network |
FR2846183A1 (en) * | 2002-10-21 | 2004-04-23 | Evolium Sas | Network controller and equipment port change managing method, involves ordering message to continue connection on port while maintaining another port till it receives data from latter port and/or acknowledgment from equipment |
US20050085230A1 (en) * | 2003-10-16 | 2005-04-21 | Motorola, Inc. | Circuit and method for producing a pilot strength measurement message |
US7957705B1 (en) | 2008-03-18 | 2011-06-07 | Sprint Spectrum L.P. | System and method for reducing radio frequency interference caused by a carrier |
US10581709B2 (en) * | 2015-10-29 | 2020-03-03 | Verint Systems Ltd. | System and method for soft failovers for proxy servers |
US11212205B2 (en) * | 2015-10-29 | 2021-12-28 | Verint Systems Ltd. | System and method for soft failovers for proxy servers |
Also Published As
Publication number | Publication date |
---|---|
JP3762069B2 (en) | 2006-03-29 |
CA2216225A1 (en) | 1998-04-11 |
JPH10136428A (en) | 1998-05-22 |
KR100262923B1 (en) | 2000-08-01 |
GB9720005D0 (en) | 1997-11-19 |
AR008480A1 (en) | 2000-01-19 |
CA2216225C (en) | 2001-01-30 |
BR9706522A (en) | 2001-06-05 |
GB2318256A (en) | 1998-04-15 |
DE19744177B4 (en) | 2005-11-17 |
CN1114325C (en) | 2003-07-09 |
KR19980032721A (en) | 1998-07-25 |
CN1179682A (en) | 1998-04-22 |
GB2318256B (en) | 2001-08-08 |
DE19744177A1 (en) | 1998-04-23 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: MOTOROLA, INC., ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WILLEY, WILLIAM DANIEL;REEL/FRAME:008281/0814 Effective date: 19961011 |
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Free format text: PATENTED CASE |
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FPAY | Fee payment |
Year of fee payment: 4 |
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FPAY | Fee payment |
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Owner name: MOTOROLA MOBILITY, INC, ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MOTOROLA, INC;REEL/FRAME:025673/0558 Effective date: 20100731 |
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FPAY | Fee payment |
Year of fee payment: 12 |
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AS | Assignment |
Owner name: MOTOROLA MOBILITY LLC, ILLINOIS Free format text: CHANGE OF NAME;ASSIGNOR:MOTOROLA MOBILITY, INC.;REEL/FRAME:029216/0282 Effective date: 20120622 |
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AS | Assignment |
Owner name: GOOGLE TECHNOLOGY HOLDINGS LLC, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MOTOROLA MOBILITY LLC;REEL/FRAME:034371/0612 Effective date: 20141028 |